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Sierra Designs

Flex Capacitor 60-75


The Sierra Designs Flex Capacitor 60-75L Backpack is an Innovative Designed BackPack. The Flex Capacitor Features a Unique Gusset System that Allows the Pack to Quickly and Easily Expand from 60-75 Litres with the Adjustment of a Few Straps. The 60-75L Flex Capacitor is the Largest in the Range, with Enough Volume for Extended Trips or Shorter Trips in the Winter When you Need to Take Extra Gear.



Meet the pack that does it all. The Flex Capacitor family of packs feature adjustable volume to handle both short and long hauls, and a Y flex suspension system that carries above their weight class. With three sizes in a 25-40, 40-60, and 60-75 L capacity, there is a flex pack to fit your needs. A bucket lid with a stash pocket closes everything up, while dual stretch pockets on the shoulder straps and side of pack cover all your needs.  The 60-75L Flex Capacitor is the largest in the range, with enough volume for extended trips or shorter trips in the winter when you need to take extra gear.


  • Expandable Volume

  • 2 stretch mesh side pockets

  • 2 stretch mesh hydration pockets on shoulders

  • Zippered hip belt pockets

  • U-shaped top acces zipper

  • Small stash pocket in lid

  • Ultralight weight

  • Lightweight 'Y' Flex DAC suspension

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We Manufacture and Supply Ultralight Outdoor Gear. We Manufacture in the UK, Backpacking Quilts, Ultralight Bivys, Groundsheets and a wide range of UL Specialist Accessories.

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